Siemens Healthcare Gmbh

Siemens Healthineers Ag

University College London

Iulius Dragonu

Radhouene Neji

Heiko Meyer

Raphael Tomi-Tricot

Ali Aghaeifar

Martina Callaghan

Belinda Ding Yuan

Nikolaus Weiskopf

Craig Buckley

Daniel Papp

A method for optimization of an RF pulse that is multi-band. The RF pulse is a spokes RF pulse including a train of sub-pulses. The method includes using a starting k-space position as a current k-space position, and for each of slices to be excited by the RF pulse, performing: calculating a sub-pulse based on the current k-space position and calculating an expected magnetization after that sub-pulse; calculating an inverse Fourier transform of a difference between an expected magnetization and a target magnetization; and determining an optimal k-space position for a next spoke for this slice to be at a position where an absolute value of the inverse Fourier transform has a maximum. A next k-space position is determined for all slices together based on the optimal k-space positions determined for each slice individually. A multi-band RF pulse is determined based on the determined k-space positions.

Method for subject-specific optimization of a multi-band RF pulse

A method of acquiring magnetic resonance imaging (MRI) data from an MRI scan of an object includes generating a number of excitation sequences by, in order: generating an excitation pulse, generating an imaging magnetic field gradient, and generating a spoiler magnetic field gradient. MRI data is acquired during the generation of the spoiler magnetic field gradients. The spoiler magnetic field gradients are selected such that, during each excitation sequence, substantially the same k-space trajectory is traversed during the generation of the spoiler magnetic field gradient.

Magnetic resonance imaging

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Iulius Dragonu